Answer: There are 7 tadpoles which Jack can catch.
Step-by-step explanation:
Since we have given that
Let the number of tadpoles Jack has be x
Let the number of tadpoles Jill has be 9(x+3)
According to question,
[tex]\frac{9(x+3)}{2}-6x=3\\\\\frac{9x+27}{2}-6x=3\\\\\frac{9x+27-12x}{2}=3\\\\\frac{-3x+27}{2}=3\\\\-3x+27=6\\\\-3x=6-27\\\\-3x=-21\\\\3x=21\\\\x=\frac{21}{3}=7[/tex]
Hence, there are 7 tadpoles which Jack can catch.